IDs for hot-swap drivesThe hot-swap-drive ID that is assigned to each drive is printed on the front of theserver. The following illustrations show the location of the IDs of the drives. TheID numbers and the drive bay numbers are the same.Note:1. The drive bay IDs can vary, depending on the combination of the SAS/SATAbackplanes installed in the server.2. When upgrading drive backplane configurations, all 1.8-inch SSD drivebackplanes must be installed to the right of all 2.5-inch HDD or 2.5-inch SSDdrive backplanes. All 2.5-inch backplanes installs to the left of all 1.8-inchbackplanes.3. When you mix 2.5-inch and 1.8-inch drive backplane configurations in the sameserver, IMM resets the drive bay ID numbering by skipping bay ID numbersbased on the number of 2.5-inch drive backplanes that are installed to the leftof the 1.8-inch drives backplanes.For example, if the server has a 4x2.5-inch. drive backplane and a 8x1.8-inchbackplane configuration, the drive bay IDs for the four drives in the 4x2.5-inchdrive backplane is 0 through 3. IMM assigns the drive bay IDs for the eightdrives in the 8x1.8-inch drive backplane to start with an ID of 8 through 15.Since the drive bay IDs for the drives in the 4x2.5-inch backplane were 0through 3, IMM reset the IDs by a gap of four (because the backplane supportsfour drives), then the drive IDs in the 8x1.8-inch drive backplane starts with anID of 8 through 15. If a 8x2.5inch drive backplane had been installed, instead ofthe 4x2.5-inch drive backplane, IMM would reset the IDs by a gap of eight,then the drive IDs for the drives in the 8x1.8-inch drive backplane would startat 16 through 23. See the following example illustrations and the illustrations in“Supported SAS/SATA drive backplane configurations” on page 62 for moreinformation.In the following illustration, the drive bay IDs are in sequential order because allof the drive backplanes are 2.5-inch backplanes.In the following illustration, you have a combination of drive backplanes. Thisexample shows a 2.5-inch drive backplane and a 1.8-inch drive backplane installedin the server. In this instance, the drive bay IDs will require a gap in the bay IDnumbering between the drive IDs in the 2.5-inch and 1.8-inch drive backplanes.8 9 10 150 1 2 3Empty Empty1.8” SSD1.8” SSD1.8” SSD1.8” SSD1.8” SSD1.8” SSD1.8” SSD1.8” SSD2.5” HDD/SSD2.5” HDD/SSD2.5” HDD/SSD2.5” HDD/SSD 11 12 13 14Chapter 2. Installing optional devices 61
